Showing posts with label Compiling. Show all posts
Showing posts with label Compiling. Show all posts
Sunday, August 11, 2013
Friday, August 9, 2013
Problems compiling C in XCODE using VISA / NI
Hi,
I'm developing a program in C to communicate with my Tektronix oscilloscope. I inherited this project from a friend (who is currently incommunicado), so I can't talk to him about it.
Basically, my problem is that my program will not build due to a linker problem. I am using functions from the NI-VISA 5.4 package for OS X 10.8. However, the linker cannot seem to find the correct functions for my system:
Undefined symbols for architecture x86_64:
"_viClose", referenced from:
_setupVI in oscilloscope.o
_getData in oscilloscope.o
_closeInstr in oscilloscope.o
"_viOpen", referenced from:
_setupVI in oscilloscope.o
"_viOpenDefaultRM", referenced from:
_setupVI in oscilloscope.o
"_viRead", referenced from:
_setupVI in oscilloscope.o
_getData in oscilloscope.o
"_viStatusDesc", referenced from:
_setupVI in oscilloscope.o
_getData in oscilloscope.o
"_viWrite", referenced from:
_setupVI in oscilloscope.o
_getData in oscilloscope.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
These are all pretty basic VISA functions. I struggled in just including the correct header file, as
#include
didn't work. When I went to the verbose form, it worked:
#include "/Library/Frameworks/VISA.framework/Versions/A/Headers/visa.h"
However, then the problem started happening that I'm having now -- the object linker can't find the code for the VISA functions. I've tried changing build architctures from x86_64 to just x86, without avail. I'm currently building in i386 x86. I've also tried (under Build Phases -> Link Binary with Libraries) to link the VISA.framework to the project, but this simply gives the linker error "cannot find VISA".
I feel like I am missing something very obvious. I'm still operating under the notion that either NI-VISA did not install to the correct location, or that my build settings are incorrect.
Does anyone have any insight to lend? I've been searching through different forums for help for almost 2 days now, with no avail.
Re: Problems compiling C in XCODE using VISA / NI
Are you using Xcode or doing it from the command line?
You need to tell the compiler the library and where it is. In Xcode you would do this in the Build Phases window of the project under the Link Binary with Libraries area.
Just saw you say you tried this. Ar you sure you are setting the right path.
Where did you get the librsry from? Did you compile it on the Mac or was it compiled?
Re: Problems compiling C in XCODE using VISA / NI
Are you using Xcode or doing it from the command line?
You need to tell the compiler the library and where it is. In Xcode you would do this in the Build Phases window of the project under the Link Binary with Libraries area.
Just saw you say you tried this. Ar you sure you are setting the right path.
Where did you get the librsry from? Did you compile it on the Mac or was it compiled?
Tuesday, February 26, 2013
Weird error, never seen before when compiling
When compiling my app I was making,after not running it for a few days, it gave me an error that doesnt say where it is or how to fix it. Here is a screenshot:
Anyone know hoe to fix this? I was going to try upload my app to my iPod today, but it gave this error.
xcode 4.6 compiling takes up 100s of MBs, losing hard drive space
Hello fellow developers. I am having a hard time figuring out where my hard drive space is going. After running (compiling) the app to test, my hard drive space drops 150-300mb of space. I close the simulator and the space does not regain. I restart xcode and even restart the mac and the space is never recovered. I have lost over several GBs of hhd space now and unable to recover or even locate where the files are being created. I have used several disk management softwares to see what files take up how much space and so forth. I have cleared cache, cleared archives and such from xcode. I have tried removing and reinstalling. Any help would be appreciated. thanks community.
Saturday, February 23, 2013
Re: xcode 4.6 compiling takes up 100s of MBs, losing hard drive space
What evidence are you observing that shows your free drive space is dropping? Is it possible the space is consumed by hourly Time Machine local snapshots as described here?
http://support.apple.com/kb/HT4878
If so, the space will be surrendered when needed so don't worry about it.
Sunday, February 3, 2013
Tuesday, January 22, 2013
Compiling of an app wrote in xCode
Hello! How can I compile an app wrote in xCode ( Objective-C ) to an .app file? I use the latest xCode.
Compiling of an app wrote in xCode
Hello! How can I compile an app wrote in xCode ( Objective-C ) to an .app file? I use the latest xCode.
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